1271684 has 6 divisors (see below), whose sum is σ = 2225454. Its totient is φ = 635840.

The previous prime is 1271671. The next prime is 1271687. The reversal of 1271684 is 4861721.

It can be written as a sum of positive squares in only one way, i.e., 1149184 + 122500 = 1072^2 + 350^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158957 + ... + 158964.

It is an arithmetic number, because the mean of its divisors is an integer number (370909).

2^1271684 is an apocalyptic number.

It is an amenable number.

1271684 is a deficient number, since it is larger than the sum of its proper divisors (953770).

1271684 is a wasteful number, since it uses less digits than its factorization.

1271684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317925 (or 317923 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 1271684 is about 1127.6896736248. The cubic root of 1271684 is about 108.3410571745.

The spelling of 1271684 in words is "one million, two hundred seventy-one thousand, six hundred eighty-four".